How can I make usual phone calls using a connected mobile phone?

I have Ubuntu 10.04 installed as a desktop OS and a Symbian-based smartphone (Nokia N79). How can I use my desktop system with a headset to make and receive usual mobile phone calls using a connected (via cable or Bluetooth) smartphone?

Thanks.

You can try this: http://nohands.sourceforge.net/

From the website description:

HFP for Linux is a Bluetooth Hands-Free Profile server.

It allows your Linux system to act as a speakerphone for your mobile phone. It aims to be a compliant Bluetooth HFP 1.5 Hands Free implementation, supporting all required commands and notifications, as well as streaming audio.

HFP for Linux was designed specifically for automotive computing applications, but it can be used just as well in a desktop environment.

You should try it to discover if it's compatible with your device.

Can install Hands Free Console by using ppa:sebastian-ruehl/nohands repository.

There is the list of packages needed to install, at Sourcrforge.

sudo add-apt-repository ppa:sebastian-ruehl/nohands

sudo apt-get update

sudo apt-get install libhfp hfpd hfconsole libaudiofile0 libspeexdsp1 libdbus-1-3 libasound2 subversion g++ autoconf libtool libspeexdsp-dev libasound2-dev libbluetooth-dev libaudiofile-dev libdbus-1-dev